DC 5V adapterBuilt-in 3V cell for time memory and time memory: based on built-in
3V cell for clock movement when external power interrupted

Accessory (not included):

DC 5V adapter, optional not included in price

It's a good idea for the wooden LED digital clock as gift, home and
office decorations, it can be put in sitting room and conference
room, even for students study room: Wood material, environmental
protection, silent display